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| Product Includes | Quantity | Applications | Reactivity | MW(kDa) | Isotype |
|---|---|---|---|---|---|
| Mre11 (31H4) Rabbit mAb 4847 | 20 µl |
|
H | 81 | Rabbit IgG |
| Phospho-Mre11 (Ser676) Antibody 4859 | 20 µl |
|
H | 81 | Rabbit |
| Rad50 Antibody 3427 | 20 µl |
|
H Mk | 153 | Rabbit |
| Phospho-p95/NBS1 (Ser343) Antibody 3001 | 20 µl |
|
H | 95 | Rabbit |
| p95/NBS1 (D6J5I) Rabbit mAb 14956 | 20 µl |
|
H M R | 95 | Rabbit IgG |
| Anti-rabbit IgG, HRP-linked Antibody 7074 | 100 µl |
|
Goat |
Product Information
Total polyclonal antibodies are produced by immunizing rabbits with synthetic peptides corresponding to the amino terminus of human Rad50 or surrounding Ala740 of human p95/NBS1 protein. Activation state-specific polyclonal antibodies are produced by immunizing rabbits with synthetic phosphopeptides corresponding to residues surrounding Ser343 of human p95/NBS1 or Ser676 of human Mre11. Polyclonal antibodies are purified by protein A and peptide affinity chromatography. Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Lys496 of human Mre11A.
The Mre11-Rad50-Nbs1 (MRN) complex is a key mediator of genome maintenance, playing important roles in meiosis, telomere stability at the ends of chromosomes, and the cellular responses to DNA damage (1-5). Homodimers of the Mre11 and Rad50 subunits form a tetramer core that binds directly to DNA and associates with the Nbs1 subunit (6). The complex functions as a sensor of DNA damage and localizes to DNA double-strand breaks. At these DNA lesions, the MRN complex tethers DNA ends and processes free strands via the endonuclease and exonuclease activities of Mre11. In addition to stimulating both homologous recombination and nonhomologous end joining repair DNA pathways, MRN activates DNA damage checkpoint signaling cascades regulating cell cycle progression. In some contexts, MRN is required for ATM activation and downstream phosphorylation of p53, BRCA1, and Chk2 (7). ATM also phosphorylates Mre11, Rad50, and Nbs1 (also known as p95 and Nibrin). Notably, Nbs1 Ser343 and Mre11 Ser676 are phosphorylated by ATM. Phosphorylation modulates function and association with many mediators, some of which include 53BP1, RPA, hSSB1, TRF2, BRCA1, FANCD2, CtP1, Histone H2AX, MDC1, and WRN helicase. Each subunit is essential for mammalian embryonic development, as mice with homozygous-null mutations in Mre11, Nbs1, or Rad50 are lethal. Furthermore, MRN complex function is required in developing lymphocytes for antigen receptor gene recombination initiated by the Rag-1 and Rag-2 recombinases. In humans, Mre11 and Nbs1 mutations cause chromosomal instability and radiosensitivity and are associated with ataxia-telangiectasia-like disorder (ATLD) and Nijmegen breakage syndrome (NBS), respectively (8). Genomic instability and cancer have been shown to develop in cells with genetic mutations within MRN complex genes.
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